John b



No.. 80,066. PATENTED JULY 21., 186s. J. B. GIBSON...

- yVALVE 000K.

Luiten tetes @stmt ffice *Lettera Patent No. 80,066, dated .my 21, 186s,

' IMPROVEMENT 1N VALVE-cocks.

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To wHoM 1T MAY conceals:

l Beit known that I, J'AON B. GIBSON, of Cincinnati, Hamilton county, Ohio, have invented a newand useful Improvement in Valve-Cooks; and I hereby declare the following to be a full, clear, and exact description .thereof, reference being had to theaccompanying drawing, making part offthis specification. Y

This invention is an improvement iii the class of cocks which contain aV disk or conical valve operated by a screw-stem; and the rst part of my invention relates-to an arrangement of roller-packing, whereby the valvei stem is effectually protected fromv leakage at its open position, without the necessity of a stuing-box.

The second part of mytu'nventiou'relates to an improved mde oi' attaching the disk or valve to its stem.

In the accompanying drawing, the operative parte of evolve-cock, embodying .my invention, are reprei 4sented by axial section. l A. represents the body'or barrel, B the neck, and C the diaphragm of a customary valve-cock. 'Thn'eck screw-threaded exterioly, to receive an interiorly screw-threaded cap, I, which cap is tapped to receive the screw-threaded valve-stem .`E,.wi1ioh` terminates below in a circumferentially-grooved collar, F, which collar is encircled by abend or ring', G, of vulcanized rubber, which, at the extreme point oi' retraction of the stem, isrcompressed againshthe under side of the cap, so as to eliectually close the joint between the stem and cap inthe manner represented. I

The valve II is armed with an u pper collar, I, and a lower collar, I', and encircled by a rolling packing,

l formed by a ring'of circular section, of India rubber, J', which, with everyelevation and depression of the valve, rolle from one to the othercollar, and operates to preventjeakage without perceptibly obstructing the operation ofv the valve. Nevertheless, should any. water pass the packing J,'its escape will be e'ectually prevente( by the upper ring, G, v

The valve H has, at bottom, au undercut. cavity, K, toreceive a rubber disk, L, and at the centre of the cavity K s'still another cavity, M, for the head, n, of asorew, N, by which the valve H is secured to thelower extremity of the stem.

The dish L being inserted, s ervesthc twofold purpose of enabling `the valve to be closed air-tight upon its seat, and of covering in the screw N, and protecting-it from the action of the liquid. l i

i The use of the upper or'auxiliaryfelestic ring G e'ectually prevents the danger of stripping or bruising the stem-thread by a too violent'opening of the valve, because theaid ring operates :is a cushion, which gradually eases the upward bearing ot' the stem.V l i I claim herein as new., and of. my inventions-'- l L The rubber rings G and J, 4asarrfsnged, in combination with the valve H, stem E, and cap D, as explained.

2. The arrungementof stem E, valve H,recessed screw' N, and 'rubber disk L, as and for the purpose forth,

- In testimony of which invention, I hereunto set my hand.

' JOHN B. QIBSON 

